Answer:
B: 13
Step-by-step explanation:
To find the length of the hypotenuse of a right triangle, you can use the Pythagorean theorem if you know the length of the other two sides. Basically, you square the length of the 2 sides, a and b, and then add them together. Take the square root of the result to get the hypotenuse.
1. Square the length of a and b.
12 * 12 = 144
5 * 5 = 25
2. Add them together.
144 + 25 = 169
3. Take the square root.
The square root of 169 is 13.
In other words, the hypotenuse of this triangle is equal to √a^2 + b^2 = √12^2 + 5^2 = 13
